Schlüter®-DITRA-SOUND | Substrates | Schlüter-Systems


Substrates for Schlüter®-DITRA-SOUND

Always check the substrates on which Schlüter®-DITRA-SOUND is to be installed to make sure they are level, load bearing, clean and compatible with the materials to be used. Remove all surface components that may weaken the bond. Uneven or sloping areas must be levelled prior to the installation of Schlüter®-DITRA-SOUND.

Concrete is subject to long term dimensional changes due to curing processes. If Schlüter®-DITRA-SOUND is used, tiles may be installed after three months.

Cementitious screeds
If Schlüter®-DITRA-SOUND is used, tiles may be installed over cementitious screeds after 28 days without the need to measure residual moisture.

Calcium sulfate screeds
According to the applicable rules, the residual moisture level of calcium sulfate screeds (anhydrite screeds) may not exceed 0.5 CM% when the tiles are installed. When Schlüter®-DITRA-SOUND is used, the tile covering is ready to be installed as soon as the residual moisture level drops below 1 CM%. Calcium sulfate screeds are sensitive to moisture, making it necessary to protect the screed from further moisture ingress.

Heated screeds
Schlüter®-DITRA-SOUND may be installed over heated screeds. For this type of construction, the general regulations for conventional heated screeds with tile coverings must be observed.

Plywood panels
These materials are heavily affected by moisture (or large fluctuations in humidity). It is therefore recommended to use plywood materials that are specially treated to prevent the absorption of moisture. The thickness of the panel should be selected to ensure sufficient impact resistance in conjunction with a suitable support structure. The panels must be sufficiently secured with screws. All joints should either be tongue and groove connections or covered with adhesive. Edge joints of approximately 10 mm must be kept open at the connections with adjoining construction elements. Schlüter®-DITRA-SOUND will neutralise the minor tensions occurring within the substrate.

Hardwood floors
Schlüter®-DITRA-SOUND is generally suitable for the direct installation of ceramic coverings over hardwood floors, provided the floorboards have tongue and groove connections, are sufficiently load bearing and are securely screwed down. The wooden substrate should have reached a balanced moisture level prior to the installation of Schlüter®-DITRA-SOUND. Experts recommend the installation of an additional layer of plywood. Uneven floors must be levelled before the installation of other materials.

Synthetic coverings and coatings
All surfaces must be load bearing and if necessary, pretreated to allow for bonding with a suitable adhesive for permanent attachment of the anchoring fleece of Schlüter®-DITRA-SOUND. The suitability of the adhesive for the substrate and Schlüter®-DITRA-SOUND must be verified in advance.

Schlüter®-DITRA-SOUND allows for the installation of sound impact insulation on stairs. The material can be used on the substrate types described above.

Contact Schlüter-Systems Ltd

Units 3-5 Bardon 22,
Beveridge Lane, Coalville,
Leicestershire, LE67 1TE
Phone: +44 (0) 1530 813396

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We use the following symbols and abbreviations to illustrate our price charts.

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H = height
L = length
B = width

PL = euro pallet 
KV = case packaging 
BV = bundle (there is a 10 item bundle packaging for all the profile types)
P = box packaging 
R = roll
St. = unit